| 초록 |
The optimal interfaces for perovskite-based optoelectronic devices are critical to improve the device performance and stability. The use of optimal interlayer and additives enhance the compatibility of perovskite precursor on the hydrophobic hole transporting layers, which realize the better morphology of perovskite films. In this study, the conjugated polyelectrolytes (CPEs) with conjugated backbone and ionic functional group are introduced in perovskite-based optoelectronic devices and then the relationship between the structures of CPEs and the device characteristics are observed. In particular, the introduction of CPE additives has advantage of defect passivation capability and compatibility enhancement, results in improvement of PCE and realization of efficient large-are PeSCs. The various optical and electrical analytical techniques, including steady-state PL, TCSPC etc. have verified the good defect passivation and enhanced efficiency of perovskite devices with CPEs. |
